Drier-furnace.



C. 0. L E. E. BILLOW. DRIBR PURNAGB.

APYLIOATION FILED MAY 25, 1908.

4 SHEETS-SHEBT l.

atbozumj C. O. @a E. E. BILLOW.

DRIER FURNACB.

APPLICATION FILED MAY 25. 1908.

965% Patented Mar. 30, 1909.

4 SHEETS-SHEET 2.

C. 0. L E. E. BILLOW.

DRIER FURNAUE.

APPLICATION FILED MAY z5. 190e.

Patented Mar. 30, 1909.'

4 SHEETS-SHEET 3.

ewn aan:

.Stroming C. 0. & E. E. BILLOW.

'DEER PURNAG.

v APPLICATION TILBD HAY 25. 1908.

Patented Mar. 30, 1909.

4 SHEETS SHEET 4.

irsriiisr -CIJAYAFBT O. BIL'LOW AND ELME'R E'. BELLOW, 0F CHICAGO, ILLiNlS,

DRXERURNACE Np. mense.

Specification of Letters atent.

Patented :tifare-h 30, 1909.

Application ined nay 25. lees. semi No. retiene.

To all 'whom it may concern:

Be it known that we, CLAYTON O. BrLLoW and ELMER E. Brtrow, citizens of the United States, residing at Chicago, in the county of Cook and State et' illinois, have invented cer tain new and useful Improvements in Driel'- Furnaces, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to drier furnaces, end more particularly to furnaces designed for use in connection `with driers in. which large volumes o' highly heated dry air are pessed over and through the material te be dried at e considerable velocity.

`\The object of the invention is to rovide a furnace of this character which wi l occupy but a minimum amount of llloor space; which will be so constructed as to permit ot' a high rate of combustion, thus sflordino' a coin-- plete consumption of the fuel ant e co rre spondingly large generation ot' heat; which will thoroughly mix the air with the products of combustion and thoroughlyT diffuse the heahgenerated; 'which 'vill be so eonstructed that the heat absorbed and con'- teined in the furnace can be quickly reduced when the lire is extinguished therein.

VJith these objects in View our invention consists in certain novel features of consti-ud tion and in certain parts and combinations hereinafter' to be described, and then more particularly pointed out in the claims.

` In the accorn )an un" drawincs F 1euro 1 1s a vertical, sectional.vicw, taken centrally,

through e furnace embodying our invention Fig. 2 is a vertical, sectional view, taken cen trelly through a slightly modified forni of the furnace at right angles to the plane on which Fig. 1 is taken; Fig. 3 is transverse, sectional view of such a furnace taken on the line zr a; of Fig. 1 g Fig. 4 is o. similar view,

crete or the hi taken on the line vy y of Fig. 1; Fig. 5 is a. vertical, sectional view, taken centrally through eportion of the furnace; end Fig. 6 is' a detail view of the twyer block.

In these drawings we have illustrated the f preferred iorm of our invention and have shown the furnace as ernbodying a body portion I of fire brick, or other suitable refractorT material.A This body portion is pretera ly substentisllycylindrical in shapeand is supported'upon a foundation 2, of conre, which vis .preferably surrounded by e. pit to enable access to'be readily had to any of the perte of the furnace,

enter the mixing chamber.

This 'furnace is designed more particularly for use in connection with liquid hydrocer bon or gaseous fuel, and, in the present instance, we have shown the sume as provided with suitable means for vaporizing a hydrocarbon and injecting the saine with the proper mixture ,of air into the combustion chamber 3 which is formed in the lowenpart of the cylindrical body portion of the Jfurnace.

Each fuel injector preferably cq prises an atomizer 4 which is connected wit r ,hydrocarbon supply and which vaporizes y,this hydrocarbon under oir or steam ressure, air being preferably employed in t uit it is desirable to deliver the heated air to the drier as free 'from moisture as possible. This atomizer 4 is supported in a twycr 5 having nir inlets 6 and which, in turn, is mounted upon a plate 7 which is secured to the side of the furnace.

Mounted in the wall ol the furnace is a twyer block S having an inlet o ening 9 in alinement with the twyer 5 au( preferably having its walls converging inwardl f. `The twyer block is provided beyond th opening 9 with an enlarged inixinfr chamber 10 into which the atoiuizer d disc larges the vaporized hydrocarbon, together with the air from the twyer 5. This mixing chamber 10 has an inlet 11 in one side thereof, which inlet is in communication with an airpessage 12 extending through the wall oi the furnace and provided with a controlling door 13 at the outer end thereof. Thus, an adequate amount of air is supplied to the vuporized hydrocerbon to i'orin n. highly-combustible mixture, which mixture is discharged into the combustion chamber oll the furnace through a discharge nozzle 1d formed in theI inner end of the twyer block by providing the same with a wall or bridge 15 which reduces the outlet opening, ,as shown. The inner face o'linthis bridge 15 is refer-ably inclined downwardlyend 'outward y and that portionof the lower Wall of the mixing chamber 10, which lies between the lowered 4enf theinner wall of the bridge 15 and the inhet 'opening 11 forthe mixing chamber, is slightly inclined downwardly and inwardly, as shown at 16, and the intersection othe two inclined surfaces forms arecept aele or drip shelf adapted to receive any particles o'l unveporiz'ed hydro# 'carbon or any foreign material which mcy also provided in the bottonref the combus- .0n chamber nein the discharge nozzle of the e inlet An airiinlet is provided in the walls of the furnace a twyer eral tiles, which slots extend tangentially to the Wall of the combustion chamber. The inner edges of the tile preferably extend slightly beyond thewall of the combustion chamber, as shown at 30.

atingr 82 for the furnace. This hollow casing is connected to one or more air supply pipes 33, each of which is provided with a controlling valve 34 and by means of which a regulated supply of air may be introduced into 'the casing 31 and thence by means of the slotted ring 25 into the combustion chamber.

" In Fig. 2 the hollow casing 31 is omitted and the metal covering 32 continues in a straight' line past the twyer ring. This arrangement provides a somewhat smaller chamber about the twyer ring, but otherwise the furnace is the same as that in Fig. 1. The construction of the twyerc'asing is such as to enable 'this air to be introduced into the furnace either under pressure or by an induced or natural draft. By so introducing the air into the combustion chamber we secure a higher rate of combustion and also a more intimate mixture of the air with the heat generated b the burning va ors within the combustion c amber. The Iburning vapors and air currents circulating about the combustion chamber engage the projecting ends 30 of the tiles 26 forming the twyer ringl and are deflected inwardly, thereby causing a further mixture of the air with. the heated vapors and prevent- 'ing the currents of air' which are encircling the furnace from i'uterferine,r with the entrance ofthe air through the slots of the twyer ring. In order to still further temper the heated air before the saine escapes through the outlet 22, there. `are provided in the Walls of the furnace,.and preferably above the flange or ring 23, a plurality of air passao'es 35 provided with means for controling t e same, such as butterfly dampers 36. By adjusting these dumpers the amount of air admitted to the furnace can be regulated `and.l the heated air which passes through the outlet thereby tempered.

The furnace is provided with a rounded deine or coveringsr 37 ywhich preferably in the form of a segment f a sphere and is con- Struetcd on such a radius as to radiate or deect the heat in the dome to'war the outlet The outer side of Ithe'twyer ring is inclosed in a suitable hollow lcasing 31, which, in the present instance, is yformed by bending outwardly the metal covor nozzle 22, and further, is of such a shape as to focus or accumulate the heated vapors at a point where the incoming air will readily mix with the same.

The character of the furnace herein described is such as to enable the same to be constructed with comparativel thin Walls. As a result, the furnace not on y occupies a mimimum amount of floor space, but also stores but a minimum quantity of heat within'its walls. Drier furnaces as ordinarily constructed have very thick walls, those wallsfoften beinfr as much as two feet in thickness, and uihile thc furnace is heated greatquantities of heat are stored in these walls. The drying process is sometimes tem orarily interrupted e'ither through the brea `ring; dowirof the machinery or for other causes. When this occurs the fire in the furnace is extinguished, but in the case ofthe thick walled furnaces, the large amount of heat stored by the walls thereof is given off and the temperature of the furnace maintaincdkat a very high degree, thus burning the product which remains in the drier and often injuring the drier itself. As above stated, we construct the walls of our furnace comparatively thin and, conse ucntly, they store but a comparatively smal amount of heat which is quickly' given off when the fires have been extinguished. To still further facilitate the reduci-ng of the temperature of the furnacp when such reduction is desired, we have provided the furnace with an outlet pipe 38 connecting the same with the open air. This pipe is preferably mounted in the uppermost portion of the dome or cover for the furnace and is provided with a damper 39 for controlling the same. Consequently, when it is'desired to reduce the temperature in the furnace and the fire has been extinguished, it is only necessar lto open this outlet andthe heated air wil iinn'i'ediately escape therefrom, and, inasmuch as the walls have stored but a small amount of heat, the temperature of the furnace will be speedily reduced.

The operation of the furnace will be readily understood from the foregoing description, and, inasmuch as the economic distribution and diffusion of heat in a furnace are controlled to alarga extent by the lines or contour thereof and the efficiency of such a furnace is largely due to its abilityto roverberate the products of combustion in auch a manner that the elements which produce complete combustion may be thoroughly mixed, it will be apparent that we have-provided a furnace having a maximum efficiency both as to the-production of heat and as to its distribution, and, to secure this efficiency,

We have provided a furnace of such a construction that the-flames and burning vapors which Vare incted into the combustion. 'chamber will caused 'to circulate about mede to prevent the veporized nydroeerbon ,injected et one point from interferingwith the injection of t'e veporized hydrooerbon et other points about the circumference of the eornoustion cheminer; further, that the eir to be heated is introduced into the co1nbustier. chamber in such e manner that it is entireiT surrounded 'Toy that combustion chamber end. the burning vapors tlierein, is 'thoroughly mixed with the products of com' bnstion and absorbs the neet generated by seid combustion; that the air, which is thus heeteri, is tempered ov the admission of free nir thereto to bring tile seine to the desired degree of temperature sought inthe drier g end further, that the furnace is o? suc-l1 a com struction that it will store Within its Walls but small amount oi heat and that ie provided with Ineens Jfor rapidiv reduoing the temperature thereof when t ie iire nes. been extinguished or Withdrawn thereirom. Further, it will iie' apparent that we here provided en injector comp l ing en otornizer end mixing eheinber which are pecuiieriy adapted for use in connection Withthis furnece and which ere so arranged therein es to efiord the greatest possible eiiicienoy in the injection of *fuel into the combustion charniier. f

W e Wish it to be understood that we do not desire to ne limited tothe details of eon struetionsiiovm' and described, -ier obvious modifications 'will occur to e person skilled in the ert.

Hoving time fully' described our invention what We claim es new and desire to secure by LoL-ers Potent, is: l

i. A furneee oi the character. described comprising e body portion herring en oir iniet, end en outlet ebow/'e seid oir inlet, e combustion ciienber eci-jeoent to seid ei'l iniet, and ineens ioeeted between seid inlet and seid outlet "for 'tempering tire air which is hearted in seid combustion oiiemoer before it passes through seid outlet.-

2. A fornisce of the character described oornprising e, body portion having e ooinbus* tion chamber in the lower port thereof, en oir inlet arranged in seid Combustion ehem.- ber, en outlet in seid body portion above seid inlet, and mee-ns loc-ated between seid inlet end seid outlet for tempering; the hea-ted nir.

3. le. furnace of the character described comprising e body portion having e ooinlnis tion eiiamqoer in the lower portion thereof, end en eir inlet centrally arranged in seid combustion chamber, seid body portion new ing en `air outlet 'above said sur inlet end Ineens for tempering the air es it posses 'from seid inlet to seid outlet.

e'. A. fornace of the character described eoniprieizog e body pormon having 2. combustion cheminer tile lower por n oir centriiiirr arranged n tion chamber and oonigrieinf ing some dieienee above tii chamber, seid body portion above 'the end oi seid fue, ioeeted between seid fine and ser tempering die heated rir lie-fore tiir nggii seid outiet.

5. i'iirnece 'the onerecter eoinprising body portionen ri Emily arranged in seni body po; bottoni thereof e eombuetion rounding seid oir inlet, en nir onwel. upper part oi seid .body portion, in tempering tlie-eir :ie it pensee inlet to seid ontiet, and lov tween seid air inlet and the products oi ooinon with seid or it poseer, outlet 611i fui-nece oi the con'iprising e body portion, en trellj arranged in seid body or the bottoni thereof, corner surrounding seid eir intr-L, on oir o, doper roert oi' seid body port tempering tiie en it Teef to seid outlet, end i Werriijf from the Weile j neming upwerdiy whereby the "produ,

eens-ed to mix u" through snif, i "furnace or tire c comprising e body portion fiber7 foei injectors ie fuel Loto comin lier underoressure and att Mirto the Wells thereof, end nie-fine tile foei from one of seid in-ie .disoiierge end ot' enotiier inier 8. 'iurneee of 'tile e body; portion ile-ving e eo bei; fei injectors arranged fuel into seid ooirilmstion ei? pressure end et on nentek thereof, tire bottoni o*l elinrnlier lie fing uowerdiy ino errenged between the Mij leent i), in e, 'lurnoee oi" the onere-o .r r tile combinetiom with. o body nor e eonlmstion chamber, 'fuer ranged to discharge the foei int-o bustion chamber onder preesure" ecute ongle to the Weile if? extending upwardly' from combustion ei'iemiyer, sf combustion c-,liifxiier @lined portions between the osent edges or seid ineiiner `gortione 'i the upper end or" i0. A furneoe comprising body po emoto mounted in the Wells ol sind furncce between said nir inlet and seid `dir outlet.

11;A A furnace oll the character described comprising n body portion having n combo tion chamber, on en' inlet znrenffed within said combustion chamber, en outlet formed in .said body portion, ond n twyer ring mounted in the wells of scid^ furnace between said air inlet and seid nir outlet, end bovin a. plurality ci openinfs arranged ten gentio, ly to the Wells of seidlfurnece.

12.. A furnace of the character described' coinprisino' a body portion having c conibufi tion chamber, en nir inlet neer the bottom of seid body portion, en outlet formed in seid body portion ebove seid .in.let,'e.nd o twyer ring mounted in the wells of seid body poi'-, tion and comprising e plurality of tiles zn ranged at en ongle to the Wall of seid 'furnace endV having slots formed beti'en the Sonie.

13. A. furnace of the cher'ecter described comprisin' a, body portion having a conibue-` tion cham er, en eil inlet neer the bottom of 'seid body portion, mi outlet formed in seid body portion above seid inlet, und o,v 'tWyer ring mounted in the Wells of seidebody portion and coniprisiiin7 e plurality o tiles bev ing their inner endb extending et an, ecute angle to said Well end bevondjtbeirner face thereof and having slots formed between the adjacent tiles.

14; A furnace of the charocter; described comprisingn-bodA portion'bxwing en air inlet and an air out et, e. combustion chamber,

a t er rin mounted inthe Wellof seid body portion :in hei/'ing ite elots extending et on acute angle to tbewell thereof., and e.' arising inclosing theouter' edge of sind twyer'ring,

fand an, nir supply pipe connected to sind casing. v Y n 15. 'A yfurnace `ci tbe character described compnsm a body .portion liet-ing e eombustion chem er, en mr inlet neer seid conibustion cheniberyen ser outlet, means located between Selden* inlet and sind oir outlet for delcoting the products) of combustion to vwerd tthe center of seid furnace, en cir pessge formed in the Well of seid body portion f above seid deflecting ineens, and means for controllmg sage.

comprisinv l tion chamber, en oir inlet, en cir outlet above the admission of nir to seid pce- 16. 'A furnace of the character, described a body portion bovino e co1nbns- 'scidsir inlet, and e. closure for the upper end fof-"meid body portion bovine; en opening therein, and menne for controlling seid openfor tempering the ne it posses from seid inlet to sind outlet, und e donn-s, n.: pcd closure for scid body portion.

18. A inrnocc oi the character described comprising e substantially cylindrical body portion having e conibnstion chamber, nn :tir inlet, nn nir outlet above said oir inlet, n, do1ne-shoped closure .for scid body portion bovino,F en Youtlet pipe, and n cubed' in said pipo` i9. ln n 'urncce ol the cbnrncter described, the coinbinetion, with e body portion lixiving e combustion chamber, of e. fuel injector mounted in the Well of eeid body portion end comprising en ntonn'zer, e twyer block mounted in the Woll of' unid body portion rind having an opening in elineinent with scid ctomizer, and e mixing chamber formed therein beyond seid meningA V 20. ln e furnace or t e character described, the combination, with :tbody portion new ing combustion cheniber, of n tw'ye block mounted in the woll of said bod y portion and hei/'in e mirino chamber thcrcin,- an inlet to sei mixing chamber, 'e txvyer mounted in elinement with seid' inlet, end on etoinizer mounted in said twyer and adapted to die charge into seid mixing chamber.

21, ln a. furnace of the character described, the combination, with a body portion baving-a. combustion chamber, sind en etomizer mounted in the'wall of said body portion, of e twyer block mounted in elineinent with scid ntoniizer and heffing e, mixing chamber ,formed therein, seid mixing chamber having 'an air inlet independent oi eeid otoniizer.

22. In a, furnace of the character described, the combination, with a. body portion heving e combustion chamber, endcnetomirer adapted tor discher re into seid combustion chamber, ol e twyerilook sup ported in eline ment with scid etomizer and her-ing c mixing chamber, a bridge et the inner end of sind twyer block, end e drip shelf formed Within said mixing chamber.

23. A furnace of the character described comprising c substantially cylindricelbody ortion having e combustion chamber in the ower portion thereof,I en air inlet centrally arranged within seid combustion chamber, fuel injectors arranged tengentmlly of sind combustionoheniben'fcn outlet formed in seid body portion ebove' seid inlet, n' flange extendingI inwardly from. tbe'welle of sind body portion betvrecnsnid inl.et cnd'seid outlet and hcving en inwardly inclined inner edge, en cir passage fornied in 'the Well of seid body portion between scid inlet und seid outlet, and ineens controllingeeid air passage.

24. A furnece of the cherecter described comprising e subetentially cylindricnlbody ortion heffing e, combustion chamber in the 'ower port therein?, en stir inot comprising e. flue arranged centrally of :mid combustion the wail of sodbody poaionl above said uol tojootos5 of @inzending nwoydy from'the wai?. o' @oid *Jody portion obovo said twyof ff, wa of szi: @ood-5.? ormon above said ango, moans fo? oonroilng the passage of ai@ hough said ai? possogo, a oosuo for said body pori-ion, im. outflot in. said closure, moons foi oonioliug said. oui-let, and an or in the said potons on o? possogo fomed in th @wooo 25.11%, fummo of the ohaootos: dosox'bod oompmsmg o body portion lomg o combos# tion fohamoo, an o? inlet orronod Wihio said 'combusv'on chamba?, on ou'ot omod in said body portion; and o migrer mongie@ in the woll of sold fummo between sodpsoi inlet ond said air outlet., "gflo tootmony whereof, We 9533;; our slgfoaff tuyos in presence of two Witnesses.

"CLAWON Q. BELOW.

ELMER E, BILLW.

CHQBLES F. FOSTER, J. HENRY MEYERS. 

